Subsequent Events - Derivative Instruments Outstanding (Details) - USD ($) $ in Millions	Apr. 30, 2025	Mar. 31, 2025	Mar. 31, 2024
Subsequent Event
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount	$ 148.8
Interest rate swaps | Designated as Hedging Instrument
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount		$ 727.8	$ 1,700.0
Interest rate swaps | Designated as Hedging Instrument | Lions Gate Entertainment Corp.
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount		$ 727.8	$ 1,700.0
Interest rate swaps | Designated as Hedging Instrument | Subsequent Event | Lions Gate Entertainment Corp.
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount	148.8
Interest Rate Swap, Fixed Rate Paid 3.449%, Effective Date April 14, 2025 | Interest rate swaps | Designated as Hedging Instrument | Subsequent Event
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount	$ 100.0
Fixed rate paid (as percent)	3.449%
Interest Rate Swap, Fixed Rate Paid 3.449%, Effective Date April 14, 2025 | Interest rate swaps | Designated as Hedging Instrument | Subsequent Event | Lions Gate Entertainment Corp.
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount	$ 100.0
Fixed rate paid (as percent)	3.449%
Interest Rate Swap, Fixed Rate Paid 3.646%, Effective Date April 14, 2025 | Interest rate swaps | Designated as Hedging Instrument | Subsequent Event
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount	$ 48.8
Fixed rate paid (as percent)	3.646%
Interest Rate Swap, Fixed Rate Paid 3.646%, Effective Date April 14, 2025 | Interest rate swaps | Designated as Hedging Instrument | Subsequent Event | Lions Gate Entertainment Corp.
Subsequent Event [Line Items]
US Dollar Amount or Notional Amount	$ 48.8
Fixed rate paid (as percent)	3.646%